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A positively charged rubber rod is moved close to a neutral copper ball that is resting on a nonconductin sheet of plastic. (a) Show how the charges are arranged on these spheres if they are very far from each other. (b) If the sphere's are now broght close to each other, but do not touch, sketch how the charges will be distributed on their surfaces. (c) In part (b), show how the charges would be distribued if both spheres were negative.
The brakes are applied to a car traveling on a dry, level highway. A typical value for the magnitude of the car's acceleration is 5.45 m/s2. If the car's initial speed is 33 m/s, how long does it takes to stop and how far does it travel, starting ..
the acceleration of gravity at the surface of moon is 1.6 m/s^2. A 5.0 kg stone thrown upward on moon reaches a height of 20m, find its intial velocity
A 37.0 kg child runs with a speed of 2.50 m/s tangential to the rim of a stationary merry-go-round, Calculate the initial kinetic energy of the system
A 3.8-kg block of iron (c=0.11 kcal/kgoC) that has been brought to a temperature of 1,078oC is placed on top of a 2.4-kg block of ice (c=0.5 kcal/kgoC) that has been cooled to -50oC
0.160kg of water at 88.0 degrees is poured into an insulated cup containing 0.234kg of ice initally at 0 degrees. Calculate the mass of liquid
calculate the work done on a charge Q. If an automobile rounds this curve at 30 {rm m/s}, what is the least coefficient of static friction between tires and road needed to prevent skidding.
To monitor the breathing of a hospital patient, a thin belt is girded around the patient's chest as in the figure below. The belt is a 160-turn coil. find the magnitude of the average induced emf in the coil during that time
What is the angular velocity in rad/s . What is the least pressure obtained inside the bottle? What will happen when this pressure is reached.
Two parallel wires with centers separated by 8.7mm each carry 11A in the opposite direction. Find the magnitude of the force per unit length on each wire
Styrofoam has a density of 300 kg/m^3. What is the maximum mass that can hang without sinking from a 40cm diameter Styrofoam sphere in water? Assume the volume of the mass is negligible compared to that of the sphere.
A 5600 kg mass car is taking a turn at 72 m/s. If the frictional force here is 44,000N, what is the radius of curvature of the turn
After landing on an unfamiliar planet, a space explorer constructs a simple pendulum of length 47.0cm . The explorer finds that the pendulum completes 110 full swing cycles in a time of 145s A. What is the magnitude of the gravitational acceleration ..
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